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LiliLil
@LiliLil
April 2019
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Pouvez vous m'aidez a résoudre les équations: a) 2x-4=3-5x. b) x-2=5x-4. c) x+5=-4x+3. d) 30+5t=2-2t.
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droopette
a) 2x-4=3-5x
2x+5x=3+4
7x=7
x=7/7
x=1
b) x-2=5x-4
x-5x=-4+2
-4x=-2x
x=2/4
x=1/2
c) x+5=-4x+3
x+4x=3-5
5x=-2
x=-2/5
d) 30+5t=2-2t
5t+2t=2-30
7t=-28
t=-28/7
t=-4
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2x+5x=3+4
7x=7
x=7/7
x=1
b) x-2=5x-4
x-5x=-4+2
-4x=-2x
x=2/4
x=1/2
c) x+5=-4x+3
x+4x=3-5
5x=-2
x=-2/5
d) 30+5t=2-2t
5t+2t=2-30
7t=-28
t=-28/7
t=-4